FIG. 2. Excited-state HF results for jellium, for various Λ= R/N , compared to free electron results (dotted lines). (rs/a0= 4, ε0F = k 2 F/2.) Top: Energy vs wave vector dispersion relations λ(k). WhenΛ= 1, λ(k)= ε(k). Triangles (N) mark logarithmic divergence in dλ/dk at Fermi level of fictitious R-electron system. Bottom: DOS g (λ(k)), showing the zero at the Fermi level of the fictitious R-electron system.
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